Class 251/36 - With separate dashpot or choked fluid retarding chamber

Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter in which an expansible chamber, other than
No. of patents: 30
Last issue date: 04/29/2008

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Number	Title	Issue Date
7363848	Rotating or pivoting device and connection module for a rotating or pivoting device The invention relates to a rotating or pivoting device (110) comprising a housing (12), at least one working piston (14) which is mounted in the housing and subjected to a pressure medium, and a pivoting part (20) which is rotatably mount...	04/29/2008
7325781	Automatic bathroom flushers with modular design A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...	02/05/2008
7188822	Enclosures for automatic bathroom flushers A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...	03/13/2007
7156363	Bathroom flushers with novel sensors and controllers A bathroom flusher (10) includes a body having an inlet (12) in communication with a supply line and an outlet (16) in communication with a flush conduit, a valve assembly in the body positioned to close water flow between the inlet and the outl...	01/02/2007
7124774	Control valve A control valve for regulating flow of fluids passing through the valve. The control valve includes a body with an inlet, an outlet and a passageway through which the fluid passes from the inlet to the outlet. The control valve also includes a displaceable column pr...	10/24/2006
6934976	Toilet flusher with novel valves and controls A tank-type flusher includes an intake valve, i.e., a fill valve, a diaphragm-operated flush valve, and a pressure control mechanism. The intake valve is connected to an external water source and is constructed to close water flow to a water storage tank at about a ...	08/30/2005
6929237	Valve actuation system and methods for pipeline valves The invention is therefore directed to a rotary valve actuating system coupled to a pipeline for a pressurized fluid, the actuating system being coupled to the rotary valve to selectively cause operation of the valve. The valve actuating system comprises at least tw...	08/16/2005
6286533	Metering valve assembly A metering valve assembly for use in sanitary applications and method of use is disclosed. The metering valve assembly has a relief valve hydraulically controlling a pilot valve covering a water supply inlet. The relief valve is controllably closed by a d...	09/11/2001
6076798	Fluid actuating valve The present invention relates to a fluid actuating valve, wherein the valve body (1) comprises a longitudinal tubular body (11) and a transversal cylinder body (12), the longitudinal tubular body (11) defines a longitudinal fluid passage (113), and the tr...	06/20/2000
6073651	Damped valve A valve includes a device for shutting off a valve interior. The shutoff device is positioned by a piston which is guided in a cylinder and forms a first chamber and a second chamber in the cylinder. The second chamber communicates with the valve interior...	06/13/2000
6041809	Two stage flush control valve assembly A control valve assembly for flushing a sanitary fixture includes a burst valve for supplying flush water flow at the beginning of a flush cycle and an independently controlled bypass valve for providing trap reseal flow after the burst valve closes. The ...	03/28/2000
6027037	Accumulator fuel injection apparatus for internal combustion engine An accumulator fuel injection apparatus for an internal combustion engine is provided which includes a solenoid-operated fuel injector. The fuel injector includes a solenoid valve and a needle valve. The solenoid valve establishes and blocks fluid communi...	02/22/2000
5873561	Two-port cartridge seat valve A two-port cartridge type seat valve has a valve sleeve with a stepped guide bore for a poppet. The poppet includes a piston flange that divides the second step of the guide bore axially into an end-face first pilot chamber and an annular second pilot cha...	02/23/1999
5839661	Solenoid valve and fuel injector for internal combustion engine using the same A rapid-response solenoid-operated fuel injector for diesel engines is provided which includes a solenoid-operated valve member and a needle valve. The solenoid-operated valve member selectively establishes fluid communication between a fuel inlet and a f...	11/24/1998
5505427	Flushometer handle seal A toilet flushing device includes a body which has an inlet and an outlet. There is a valve seat in the body in the flow path between the inlet and the outlet and there is a valve member movable within the body toward and away from the valve seat to contr...	04/09/1996
5294090	Valve snubber A snubber which may be used with a diaphragm actuator or other movable member to prevent sudden movement of the movable member is provided. A typical diaphragm actuator has a diaphragm housing with a movable diaphragm therein dividing the diaphragm housin...	03/15/1994
5213304	Valve A buffered valve having a longitudinal passage leading to a valve chamber. The valve chamber is divided by a spacer into a front and rear chamber which are connected by a port in the spacer. A normally closed main valve member is in the front chamber whic...	05/25/1993
5048790	Self-modulating control valve for high-pressure fluid flow A self-modulating control valve for high pressure fluids, particularly gas in three interacting pressure chambers are provided in association with the main disc which includes two piston portions of different diameters, one of which operates as a spool va...	09/17/1991
4875501	Electromagnetic proportional control valve apparatus An electromagnetic proportional control valve apparatus comprises a valve body, a spool accommodated in a guide bore in the valve body, a valve seat element arranged at one end of the guide bore and facing toward the spool, a pilot valve controlling a val...	10/24/1989
4832310	Flush control valve A flush control valve (10) for metering a predetermined amount of flush fluid, or other liquid, to a facility, such as a urinal, to be flushed. The flush control valve (10) has a push button cap (166) that is actuated to cause the primary valve assembly (...	05/23/1989
4799645	Pilot operated hydraulic control valve A pilot operated control valve includes a spool type pilot valve member which is coupled to the main valve member by a pair of springs so that both pilot pressure forces and spring forces act on the main valve member. The main valve member and the housing...	01/24/1989
4785851	Vacuum security valve having a buffer volume A vacuum security valve includes a buffer volume in a movable piston. The movable piston has two orifices communicating with the buffer volume, the first orifice communicating with a clearance volume above the piston. A flexible diaphragm is connected to ...	11/22/1988
4699351	Pressure responsive, pilot actuated, modulating valve The pressure responsive, pilot actuated, modulating valve comprises a main valve assembly which defines with the housing a first chamber and controls flow of fluid from an inlet port to an outlet port. A pressure responsive piston is provided which define...	10/13/1987
4610423	Poppet valve In a poppet valve having a poppet slidingly movable in a casing formed with an inlet port and an outlet port through which a pressurized fluid such as oil is supplied and delivered, the cross-sectional area of a rear end of the poppet to which one part of...	09/09/1986
4482127	Valve structure A valve of the type which is actuated under the pressure of the medium it controls and in which axially-aligned actuating and damping pistons are disposed within cylindrical relief and damping chambers and are connected to a valve element engageable with ...	11/13/1984
4390037	Gas regulation device for gas actuated valves A gas regulation device to delay for a predetermined time the closing of a gas actuated main valve of the type having a main valve conduit connected to the main valve for carrying the gas which actuates the main valve. The regulation device comprises a fi...	06/28/1983
4309021	Valve structure A valve of the type which is actuated under the pressure of the medium it controls and in which axially-aligned actuating and damping pistons are disposed within cylindrical relief and damping chambers and are connected to a valve element engageable with ...	01/05/1982
4282895	Freeze-proof, pollution free valve A valve is located below the frost line in the water supply line for a drinking fountain or the like. When the valve is opened, a piston is raised by the water pressure, compressing a spring. When the valve is closed, the spring retracts the piston, sucki...	08/11/1981
4227674	Liquid metering valve A liquid metering flush valve to be installed in connection with plumbing fixtures such as water closets, urinals, service sinks, and other equipment and to supply said fixtures with a predetermined amount of water; which may be potable water, contaminate...	10/14/1980
4190230	Scavenging air valve for cleaning tubular air filter bodies A scavenging air valve for cleaning at least one tubular filter body is disclosed. The air valve has a laminar valve body, one side of which forms, by means of its inner portion, the shutoff for the inlet of a scavenging air line. Its edge zones of said o...	02/26/1980

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Class 251/36 - With separate dashpot or choked fluid retarding chamber